Global fields are local - http://help.filemaker.com/app/answers/detail/a_id/3604/~/global-fields%3A-an-overview
Global fields will be wiped after the scheduled task is complete. That data will not persist. You should store your data in table fields.
Thank you. I knew that was true for clients, but on FMP11 I was able to run the script on the server to update the server globals, which would then be initialized to the clients. I will update my scripts.